A Long Span Roof

Cambridge, MA,

With Patrick Weber

The design of a long span canopy was driven by an interest in using the bending moment to shape the profile and cross section of the main structural members. A ceiling surface was then derived from the geometries of the load carrying members. In this way the moment analysis was the genesis for the structural form, and the spatial experience. An analysis of various loading conditions allowed us to adjust the cross section at various key moments. The resultant profile was able to accommodate both uniform and asymmetrical loading conditions. Calculations were completed by considering glu-laminated timber beams as an appropriate material that would allow for both the shaping of the profile, as well as a balance between material strength and member size.